diff --git a/AGENTS.md b/AGENTS.md
index f538d885..a50c5935 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -82,7 +82,7 @@ When CodeGraph MCP tools are available and `.codegraph/` exists, prefer them for
 - yarn
 - oxlint
 - oxfmt
-- tsgo
+- tsc (TypeScript 7 native compiler)
 
 ## Project Structure
 
diff --git a/docs/upload-automation-retest-checklist.md b/docs/upload-automation-retest-checklist.md
index 21e230e6..bf064ae3 100644
--- a/docs/upload-automation-retest-checklist.md
+++ b/docs/upload-automation-retest-checklist.md
@@ -11,7 +11,7 @@ Run before merge/rollout. All must pass.
 | `yarn test` | Unit tests (Vitest) | Exit 0 = pass. Fix failing tests before merge. |
 | `yarn build` | Production build | Exit 0 = pass. No build errors. |
 | `yarn lint` | Lint (oxlint) | Exit 0 = pass. Fix lint errors. |
-| `yarn type-check` | TypeScript (tsgo) | Exit 0 = pass. Fix type errors. |
+| `yarn type-check` | TypeScript (tsc) | Exit 0 = pass. Fix type errors. |
 | `yarn doctor` | React Doctor | Advisory. Prioritize `error` > `warning`. |
 
 **Quick run (all quality gates):**
diff --git a/package.json b/package.json
index c0e9c25e..b7857d40 100644
--- a/package.json
+++ b/package.json
@@ -102,7 +102,7 @@
     "knip": "knip --production --include dependencies,unlisted,binaries --no-progress",
     "knip:full": "knip --no-progress --no-exit-code",
     "lint": "oxlint src/**/*.{js,ts,tsx}",
-    "type-check": "tsgo --noEmit",
+    "type-check": "tsc --noEmit",
     "prettier": "oxfmt src/**/*.{js,ts,tsx} electron/**/*.{js,mjs}",
     "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s -r 0",
     "android:build": "corepack yarn build && corepack yarn cap sync android && corepack yarn cap run android --flavor github",
@@ -148,7 +148,6 @@
     "@reforged/maker-appimage": "5.1.1",
     "@types/lodash": "4.17.24",
     "@types/memoizee": "0.4.9",
-    "@typescript/native-preview": "^7.0.0-dev.20251226.1",
     "@vitejs/plugin-react": "6.0.0",
     "@vitest/coverage-istanbul": "4.1.0",
     "@xhmikosr/decompress": "11.1.3",
diff --git a/public/llms-full.txt b/public/llms-full.txt
index 2f801e22..522da9e5 100644
--- a/public/llms-full.txt
+++ b/public/llms-full.txt
@@ -262,7 +262,7 @@ When CodeGraph MCP tools are available and `.codegraph/` exists, prefer them for
 - yarn
 - oxlint
 - oxfmt
-- tsgo
+- tsc (TypeScript 7 native compiler)
 
 ## Project Structure
 
@@ -1262,7 +1262,7 @@ Run before merge/rollout. All must pass.
 | `yarn test` | Unit tests (Vitest) | Exit 0 = pass. Fix failing tests before merge. |
 | `yarn build` | Production build | Exit 0 = pass. No build errors. |
 | `yarn lint` | Lint (oxlint) | Exit 0 = pass. Fix lint errors. |
-| `yarn type-check` | TypeScript (tsgo) | Exit 0 = pass. Fix type errors. |
+| `yarn type-check` | TypeScript (tsc) | Exit 0 = pass. Fix type errors. |
 | `yarn doctor` | React Doctor | Advisory. Prioritize `error` > `warning`. |
 
 **Quick run (all quality gates):**
diff --git a/tsconfig.json b/tsconfig.json
index 5ea6d10f..5b961dac 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    "target": "ES2015",
+    "target": "ES2018",
     "lib": [
       "dom",
       "dom.iterable",
@@ -15,6 +15,7 @@
     "noFallthroughCasesInSwitch": true,
     "module": "esnext",
     "moduleResolution": "bundler",
+    "types": ["node"],
     "resolveJsonModule": true,
     "isolatedModules": true,
     "noEmit": true,
diff --git a/yarn.lock b/yarn.lock
index 29da59bc..e8b9833d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -35,7 +35,6 @@ __metadata:
     "@types/node": "npm:20.19.37"
     "@types/react": "npm:19.2.16"
     "@types/react-dom": "npm:19.2.3"
-    "@typescript/native-preview": "npm:^7.0.0-dev.20251226.1"
     "@use-gesture/react": "npm:10.3.1"
     "@vercel/analytics": "npm:^1.6.1"
     "@vitejs/plugin-react": "npm:6.0.0"
@@ -7385,87 +7384,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@typescript/native-preview-darwin-arm64@npm:7.0.0-dev.20251226.1":
-  version: 7.0.0-dev.20251226.1
-  resolution: "@typescript/native-preview-darwin-arm64@npm:7.0.0-dev.20251226.1"
-  conditions: os=darwin & cpu=arm64
-  languageName: node
-  linkType: hard
-
-"@typescript/native-preview-darwin-x64@npm:7.0.0-dev.20251226.1":
-  version: 7.0.0-dev.20251226.1
-  resolution: "@typescript/native-preview-darwin-x64@npm:7.0.0-dev.20251226.1"
-  conditions: os=darwin & cpu=x64
-  languageName: node
-  linkType: hard
-
-"@typescript/native-preview-linux-arm64@npm:7.0.0-dev.20251226.1":
-  version: 7.0.0-dev.20251226.1
-  resolution: "@typescript/native-preview-linux-arm64@npm:7.0.0-dev.20251226.1"
-  conditions: os=linux & cpu=arm64
-  languageName: node
-  linkType: hard
-
-"@typescript/native-preview-linux-arm@npm:7.0.0-dev.20251226.1":
-  version: 7.0.0-dev.20251226.1
-  resolution: "@typescript/native-preview-linux-arm@npm:7.0.0-dev.20251226.1"
-  conditions: os=linux & cpu=arm
-  languageName: node
-  linkType: hard
-
-"@typescript/native-preview-linux-x64@npm:7.0.0-dev.20251226.1":
-  version: 7.0.0-dev.20251226.1
-  resolution: "@typescript/native-preview-linux-x64@npm:7.0.0-dev.20251226.1"
-  conditions: os=linux & cpu=x64
-  languageName: node
-  linkType: hard
-
-"@typescript/native-preview-win32-arm64@npm:7.0.0-dev.20251226.1":
-  version: 7.0.0-dev.20251226.1
-  resolution: "@typescript/native-preview-win32-arm64@npm:7.0.0-dev.20251226.1"
-  conditions: os=win32 & cpu=arm64
-  languageName: node
-  linkType: hard
-
-"@typescript/native-preview-win32-x64@npm:7.0.0-dev.20251226.1":
-  version: 7.0.0-dev.20251226.1
-  resolution: "@typescript/native-preview-win32-x64@npm:7.0.0-dev.20251226.1"
-  conditions: os=win32 & cpu=x64
-  languageName: node
-  linkType: hard
-
-"@typescript/native-preview@npm:^7.0.0-dev.20251226.1":
-  version: 7.0.0-dev.20251226.1
-  resolution: "@typescript/native-preview@npm:7.0.0-dev.20251226.1"
-  dependencies:
-    "@typescript/native-preview-darwin-arm64": "npm:7.0.0-dev.20251226.1"
-    "@typescript/native-preview-darwin-x64": "npm:7.0.0-dev.20251226.1"
-    "@typescript/native-preview-linux-arm": "npm:7.0.0-dev.20251226.1"
-    "@typescript/native-preview-linux-arm64": "npm:7.0.0-dev.20251226.1"
-    "@typescript/native-preview-linux-x64": "npm:7.0.0-dev.20251226.1"
-    "@typescript/native-preview-win32-arm64": "npm:7.0.0-dev.20251226.1"
-    "@typescript/native-preview-win32-x64": "npm:7.0.0-dev.20251226.1"
-  dependenciesMeta:
-    "@typescript/native-preview-darwin-arm64":
-      optional: true
-    "@typescript/native-preview-darwin-x64":
-      optional: true
-    "@typescript/native-preview-linux-arm":
-      optional: true
-    "@typescript/native-preview-linux-arm64":
-      optional: true
-    "@typescript/native-preview-linux-x64":
-      optional: true
-    "@typescript/native-preview-win32-arm64":
-      optional: true
-    "@typescript/native-preview-win32-x64":
-      optional: true
-  bin:
-    tsgo: bin/tsgo.js
-  checksum: 10c0/99df69ff117c2e5d4d6ca028f20f0453b1151cfab54a5614231f60a57fd98ea0152a423a58127b1b61aa7f677004931a03217e9ebe71d968be3d91e3776ad49f
-  languageName: node
-  linkType: hard
-
 "@typescript/typescript-aix-ppc64@npm:7.0.2":
   version: 7.0.2
   resolution: "@typescript/typescript-aix-ppc64@npm:7.0.2"